package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对 [搞定 !]
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus().equals(StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        // 使用对象属性拷贝,将employeeDTO里面的属性copy到employee里面
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置员工默认状态,1启用，0禁用
        employee.setStatus(StatusConstant.ENABLE);

        // 设置密码 【默认密码123456】，使用md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 设置当前记录的创建时间和修改时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        // 设置当前记录页创建人id和修改人id
        // TODO 后期需要改为当前登录用户的id [使用ThreaLocal.get获取] [搞定 !]
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        // 执行新增语句
        employeeMapper.insert(employee);
    }
    /**
     * 员工分页查询
     * @param pageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO) {
        // select * from employee limit 0,10;
        // 1、开始分页查询 PageHelper.startPage里面使用的是ThreadLocal 设置page
        PageHelper.startPage(pageQueryDTO.getPage(),pageQueryDTO.getPageSize());
        // 取出ThreadLocal中的page
        Page<Employee> page = employeeMapper.pageQuery(pageQueryDTO);

        // 2、封装成PageResult对象
        // 总条数
        long total = page.getTotal();
        // 分页数据
        List<Employee> records = page.getResult();
        return new PageResult(total, records);
    }
    /**
     * 启用禁用员工账号
     * @param status 状态
     * @param id 员工id
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        // update employee set status = ? and id = ?
        /**
         *    Employee employee = new Employee();
         *    employee.setStatus(status);
         *    employee.setId(id);
         */
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }
    /**
     * 根据员工id查询员工信息
     * @param id 员工id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }
    /**
     * 编辑员工账号信息
     * @param employeeDTO
     * @return
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //employee.setUpdateTime(LocalDateTime.now());
        // 从ThreadLocal里面拿员工id
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

}
